2a and b8
A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6240-01-424-3636
NSN 6240-00-482-1142
NSN 6150-01-384-3893
NSN 5965-00-913-9545
NSN 6620-01-334-5815
NSN 5996-01-378-6438
NSN 5855-01-361-9787
NSN 5835-01-274-1035
NSN 6645-00-025-4771
NSN 5985-01-307-7199
NSN 6650-01-417-1797
NSN 6110-01-254-5278